Quarterly report pursuant to Section 13 or 15(d)

Marketable Securities (Schedule Of Marketable Securities) (Details)

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Marketable Securities (Schedule Of Marketable Securities) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Marketable Securities [Line Items]    
Cost $ 8,750 $ 23,500
Gross Unrealized Gains 4 0
Gross Unrealized Losses 0 (14)
Fair Value 8,754 23,486
Certificates Of Deposit    
Marketable Securities [Line Items]    
Cost 8,750 23,500
Gross Unrealized Gains 4 0
Gross Unrealized Losses 0 (14)
Fair Value $ 8,754 $ 23,486